Relative Humidity

Last updated: November 20, 2021

What Does Relative Humidity Mean?

Relative humidity is a measure of the amount of water vapor present in the air. It is expressed in the form of a percentage of the amount of water needed for saturation at the same temperature. It is also the ratio of water vapor’s partial pressure to the equilibrium vapor pressure of water at a given temperature.

It is important to not let relative humidity cross 100 per cent for aeroponics because the water vapor in the air begins to condense and form droplets. To optimize the nutrient intake of plants grown in an aeroponics system, it is necessary to moisten the roots just right to the point where it is damp and water isn’t dripping.


Maximum Yield Explains Relative Humidity

Relative humidity indicates how moist the air is as a percentage. Relative humidity is a factor that changes with temperature and pressure. It is easier to obtain high relative humidity at low temperatures and harder to do so at high temperatures.

In an aeroponics setting especially, the relative humidity of the air is measured to indicate how much misting is required for the plants. Because it is ideal to keep the relative humidity close to 100 per cent without letting the water vapor in the air condense, knowing the relative humidity will help to determine the length of the misting cycle.


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